[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.08"]
[Round "13"]
[White "Stean, Michael F"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[BlackElo "2525"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. e4 Bb7 5. Bd3 d5 6. cxd5 exd5 7. e5 Nfd7 8. O-O Nc5 9. Bb5+ c6 10. d4 Ne6 11. Ba4 Be7 12. Ne2 O-O 13. Ng3 c5 14. Nf5 Nc6 15. Be3 Ncxd4 16. N3xd4 cxd4 17. Nxd4 Nxd4 18. Bxd4 Bc5 19. Qg4 Rc8 20. Rad1 Bxd4 21. Rxd4 Rc4 22. e6 Bc8 23. exf7+ Rxf7 24. Qd1 Rxd4 25. Qxd4 Be6 26. Bb3 Re7 27. Rd1 Bf7 28. g3 Kf8 29. Kg2 Rd7 30. Re1 Qc7 31. Qe5 Qxe5 32. Rxe5 Re7 33. Rxe7 Kxe7 34. Kf3 Kd6 35. Kf4 Bg6 36. h4 h6 37. g4 Bh7 38. g5 Bg6 39. Bd1 Bb1 40. a3 hxg5+ 41. hxg5 Bg6 42. b4 d4 43. Bf3 Ke6 44. Be4 Kf7 45. Bd5+ Ke7 46. Be4 Kf7 47. b5 d3 48. Bd5+ Ke7 49. Ke3 Kd6 50. Bc4 Kc5 51. Bxd3 Bxd3 52. Kxd3 Kxb5 53. Kd4 Kc6 54. Ke5 b5 55. f4 a5 56. f5 b4 57. axb4 axb4 58. f6 gxf6+ 59. gxf6 Kd7 60. Kd4 1/2-1/2